| Abstract |
In recent years some geothermal heating system in China have been transformed from direct heating system into indirect ones. The materials used to make the plate heat exchanger are anticorrosive plated mild steel, stainlees and titanium. This paper explains the reason why the transformation is needed, and describes the fan coil of the air conditioner used in conjunction with geothermal water. Mathematical models for indirect low temperature geothermal heating system have been established, FORTRAN 77 software designed and techno-economic analysis made. The results can be used in the feasibility study of geothermal heating project and engineering. Examples of engineering application are also given. |